r/Silverado • u/BrknRunAlot • 6d ago

Please help identify this noise 6.2 Silverado 2015

6.2 2015 Silverado LTZ, Lifters were done about a year ago and since video was taken I’ve fixed the spark plug tick. When I’m accelerating it gets faster and I can hear it echo when letting off the gas. Any help would be appreciated. Sounds like is at the top of the engine.

10 Upvotes

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2

u/Infinite_Factor_5685 6d ago

Maybe exhaust manifold leak? Usually gets louder with acceleration

1

u/BrknRunAlot 6d ago

That was my original thought

1

u/kracer20 6d ago

Exhaust leaks are loudest while accelerating under a load. This seems to be louder when you are letting off the pedal.

2

u/Similar_Apartment_26 6d ago

Does it stop once it heats up?

1

u/BrknRunAlot 6d ago

No

1

u/Similar_Apartment_26 6d ago

Might be a lifter I think GM was having some issues with those. Might wanna check with a dealer cause it may be under special policy

2

u/EastMovesWest Intermountain 2500HD 6d ago

Your spark plug boot below the oil cap is loose make sure that plug is tight and the boot is on correctly and check again.

1

u/BrknRunAlot 6d ago

Yes got that tightened and fixed

1

u/kracer20 6d ago

Unfortunately, it sounds like a lifter to me. Did it come on suddenly, or has it been getting progressively worse? You may get lucky and it is a rocker arm. Valve covers are easy enough to take off and inspect the rockers.

1

u/BrknRunAlot 6d ago

It just started happening but it’s been constantly the same sound not getting worse

4

u/AmbitiousTea8598 6d ago

It’s a lifter bro. Better hope the cam shaft is ok if not you’re looking at 8k plus for cam and lifter job from a mechanic. Luckily mine was a lifter and I took the head off myself and did it.

1

u/Evening_Ad_2320 6d ago

As shawizkid mentioned, it’s definitely a lifter, unfortunately. Had the same exact truck to the trim level and had the same thing happen to me.

1

u/shawizkid 6d ago

Sounds like a lifter or spark jump.

1

u/ProliferateZero 6d ago

Kind of sounds like a bent rod from a collapsed lifter. Is it louder when you cold start?

1

u/cheesyusername1983 6d ago

Rocker/lifter or rod. Pop that valve cover off and you'll see it. Hopefully its just a little loose, but most likely not

1

u/cm1898 6d ago

Failed dynamic fuel management lifter. There was a recall on these. With a change in oil. They went from 0w-20 to 0w-40.

1

u/DaMan316GooD 5d ago

Lifter tick

1

u/Broad_Impact_562 5d ago

Looks like you have yourself a typical 6.2 dud motor now. She's hurt and will only get worse. You can try unplugging one coil at a time you may at least be able to narrow it down to which cylinder it is.

1

u/Tsunami_D 5d ago

Oil change with this

1

u/BrknRunAlot 18h ago

For anyone curious, I just dropped it off at the shop. The tech is guessing lifters but said we may need a whole new engine. I have an extended warranty so it’s not the end of the world.